The Canon EOS-1n RS is a real-time
AF single-lens reflex camera equipped with a high-speed motor drive which delivers
a blistering film advance rate of 10 frames per second (fps). However, the EOS-1n
RS was based on the EOS-1N body chassis to reconstruct and features eight modifications
which make it different from the standard version of an EOS-1N.

Major
External differences are: the appearance is basically same as EOS-1n attached
with Power
Booster Drive PDB-E1,
excluding the four changes; the "RS" name plate provides the easiest
mean of visual verification.

One lazy afternoon at the Car park
at Wisma Central.... Private Visual works for another project on www.IMAGES.com.my

In other words, virtuall ALL previous
Canon EOS SLR camera models are designed such that electronic manual focusing is
impossible during exposure. However, since the EOS-1n RS lets the photographer view
the subject at all times - even during continuous exposure - manual follow-focusing
of moving subjects is made possible through a special function that allows the user
to carry out electronic manual focusing during exposure. This function is available in RS mode only, and only when there are two or more bars displayed by the battery
check indicator. If the battery voltage falls to the point where only one bar is
displayed in the LCD panel (when the camera switches to auto speed reduction L mode,
and the film transport mode indicator blinks in the display), this operation will
not be executed smoothly or even not possible.

1. Installation of a fixed,
hard-coated pellicle mirror:-
a) No momentarily disappearance of the viewfinder image. Employment
of the hard-coated new pericle mirror, the viewfinder image remains in view at all
times which means focusing, composition of the picture and photographic effect at
the very instant of exposure can be viewed in real-time, which includes flash. For
some of you who never experiences this, when you set the camera for multiple flash
photography, you can actually see the effect of the flash burst onto the subject.
This constant viewing benefit also extends to while making continuous exposures,
object tracking performance in the predictive Al servo AF mode; moving object predictive
control can actually be viewed in real-time.
b) RT release available. Optimum release timing during slow synchro
second-curtain sync flash photography can be easily determined. The resultant picture
state under combined use of the 540EZ and multi-flash set ups can be observed in
real-time. For multiple exposures operation or in the case of long time exposure
(Bulb), the RT facilitates determination of the picture composition during multiple
exposures. Lastly, even aperture operation can be viewed in real time. i.e. * In
P or TV AE modes, actual AEB (Automatic Exposure Bracketing) operation can be viewed; * In real-time
release mode, since the aperture operation starts immediately after AF focusing is
completed at ON position, the ending instant of the AF focusing process can be easily
determined.
c) No vibration from shock causes by mirror up & down movement
The fixed mirror principle has brought another big advantage in substituting the
mirror lock-up mechanism if one always uses that to minimize any potential movement
causes by mirror bounce at the use of slow shutter speed settings. Since the handshaking
state when the shutter is released can be viewed in real-time, the shake is fed back
to the photographer to encourage increased effort in stabilizing the camera. This
is especially effective when shooting with telephoto lenses. With the RT, when you
sense or visually confirm camera shake is observed, immediate re-exposing compensates
the shake, without need for waiting to see the printed results.

Another significant benefit
brought with the fixed mirror is, since the mirror mechanism is fixed, the camera
is free from mirror movement shock; as the mirror mechanism does not move, camera
operation noise is reduced; further, as the limitation for entire pre-&-on exposure
process doesn't factor in with the up/down reflex mirror sequence, extremely fast
rapid sequence shooting exceeds the best performing rate with the standard Canon
EOS-1N with PDB-E1 combination by 166% ! This has made the Canon EOS-1n RS
the regular production SLR camera that has the fastest film advance bursting rate
on the market and it offers true autofocusing.

2. Permanent installation of the power drive booster E1 (non removable). Due to the EOS-1n RS main objective is to
entirely serving professional needs, Canon engineers thought the combination of the
PBD-E1 should be made as an integrated unit. Internally, a) Use of the M2 motor for
independent movement of the sub-mirror , this resulted with an overall quieter operation.
b) Efficient use of the gear ratio margin brought about by fixing the power conditions
"high" ---> 1.7-times increase of the continuous exposure
speed and 15% reduction of rewinding time.3. Increased continuous exposure speed High-speed continuous shooting
at a rate of up to approx. 10 fps at (RS mode - "CH")
when shooting at AF and AE locked and the aperture fixed. Since electronic manual
focusing during exposure and during continuous shooting as well as constant manual
focus compensation during shooting is also possible.
4. Addition of the RS release mode. Release time lag: 6ms a) Mode setting
can be made using the main switch (L-A-RS). b) The operation and specifications correspond
to those of the earlier Pellicle Mirror powered Canon EOS RT camera.
5. Incorporation of a double-shading shutter mechanism. Shading performance
is improved for use with the pericle mirror. Modification of the EOS-1N shutter mechanism.
(Shutter performance corresponds to that of EOS-1N.)
6. Custom function CF-12 (Selects of mirror-up function on EOS-1N) ---->>>
Turns in-focus beep on or off when focusing under AF mode. The change is necessary
as the fixed mirror mirror mechanism eliminates the need for Mirror-Lock up.
7. Electronic manual focusing under RS and continuous exposure mode. Always
available, even during exposure. (not available with EOS-1N and EOS-1); Manual mechanical
focusing operations are also workable at all time.
8. Non-interchangeable focusing screen Must be carried out at Canon service
centers or authorized network technicians.

NOTE: -The shutter unit's
dual-layer light blocking lever is driven directly from the front plate side by the
M2 motor also reads the 2-3 motors systems (in the case of
EOS-1n RS, it is only three motor systems as PDB-E1 in an integrated unit.

It was interesting that during
the mid 94 prior to the launch of the EOS-1N, a good friend of mine from Japan told
me the then proposed EOS-1N RS will provide a maximum continuous shooting burst speed
of 9.0 fps, where continuous exposure speed was slower, the eventual product stated
a different figure (withheld info) which I calculated is actually being boosted to
increase from 50% to 1.7 X, amazing , considering the duration where I thought there
were working day and night to get this speed boost works for the official launch
later. Another technical hicks was the manual focusing when used under RS mode, which
was not fully worked across the entire line of lenses and that was fixed as well
in enabling MF under RS mode to be always enabled.

A
Quick Comparison between Canon EOS-1N RS and Canon EOS-1N with Power Booster Drive
E-1

*1 Autofocus: In RS mode, the AF mode
is automatically set to One-shot AF. In RS mode, since the aperture is closed down
to the ready state at light press of shutter rlease button to activate the AF/Metering
and pictures are taken continuously with the aperture closed down to the operating
position, it is physically impossible for the camera to perform the rangefinding
signal detection necessary for Al Servo AF operation. Accordingly, when RS mode is
selected, the camera automatically sets the AF mode to One-shot AF.*2 Exposure compensation is possible
only while the metering timer is operating. Auto exposure bracketing (AEB) operation
is not possible in RS mode. When the camera is set to RS mode, AEB operation is temperily
suspended, setting is impossible, and the AEB indications are not displayed. If AEB
is set in A mode and then the main switch is switched from A to RS mode, AEB is automatically
canceled.. EB remains canceled even when the main swit6 is returned back to A mode.
Others: In RS mode, electronic dial input is impossible while the shutter button
is pressed halfway (SW-1 ON) and the aperture is closed down in the shooting-ready
state. In this ready state, the camera will not accept main dial input such as changes
to setting values (shutter speed, aperture value) or program shifts, nor will it
accept quick control dial input such as exposure compensation. Also, AF activation
with the AE lock button (CF-No.4-1) is not possible in this state.

Exposure Control

AE Lock

RS mode: main
metering on starts metering and automatically locks AE in all modes

-

Metering Range

Evaluative
metering from EV1-20; fine spot metering:- EV2-20

Evaluative
metering from EV0-20; fine spot metering:- EV3-20

DEP mode

Not possible *3

Provided

*3 Due to the priority placed on the
camera's high-speed continuous shooting control function, DEP mode was removed to
provide the necessary ROM capacity.

* Upper corner of the
captured image may be shaded by the mirror frame. ** Possible
to change at any authorized Canon Service Centre. NOTE: EOS
system accessory compatibility The dedicated PDB is permanently installed; the
PDB-El or type AA BP-EI cannot be installed. Others are the sames as with the EOS-1N
with PDB-E1 setup.

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Special Credit:- :Mr. Richard Yeow & Mr. Simon Wong from camera division of Marketing Malaysia, for
their continual effort in supporting development of this EOS/EF website.Others: All
the nice people on earth who have contributed their photos and pictures of personal
works or product shots for the creation of this site.Certain content and
images appeared in this site were either scanned from official marketing leaflets,
brochures published by Nikon and/or contribution from surfers who claimed originality
of their own work for public publishing in this website, where majority of the extracted
information are used basing on educational merits. The creator of this site will
not be responsible for any discrepancies that may arise from any possible dispute
except rectifying them after verification from respective source. Neither Nikon or
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has any interest in the creation of this site. "Canon", "EOS", "EF"
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